CN210164763U

CN210164763U - Expansion bolt

Info

Publication number: CN210164763U
Application number: CN201920859432.6U
Authority: CN
Inventors: 常洁
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-03-20
Anticipated expiration: 2029-06-06

Abstract

The utility model relates to the technical field of soft base material wall body connecting pieces, in particular to an expansion bolt, which comprises a first hollow cylinder body, a second hollow cylinder body and a plurality of clamping connecting strips, wherein the central axis of the first hollow cylinder body is superposed with the central axis of the second hollow cylinder body, two ends of the plurality of clamping connecting strips are respectively connected with the first hollow cylinder body and the second hollow cylinder body, and the plurality of clamping connecting strips are distributed around the central axis of the first hollow cylinder body; the expansion bolt is designed into a structure formed by the first hollow cylinder, the second hollow cylinder and the plurality of clamping connecting strips, so that when the expansion bolt is inserted into a wall, after the expansion bolt enters the wall, the clamping connecting strips are extruded and deformed along with the continuous screwing of the screw into the wall, the middle parts of the plurality of clamping connecting strips are extended and deformed towards the direction away from each other and enter the wall, the resistance between the wall and the expansion bolt is increased, the stability of the expansion bolt in the wall is improved, and the aim of firmer combination of an external object and the wall is fulfilled.

Description

Expansion bolt

Technical Field

The utility model relates to a soft base material wall connection spare technical field especially relates to an expansion bolt.

Background

In the building decoration industry, more and more new materials are applied to build soft base material walls, when the soft base material walls are decorated, external decorative plates or other objects are usually fixed on the soft base material walls by nailing, the traditional connecting piece has the defect of infirm connection, and the connecting piece driven into the walls is easy to pull out.

Disclosure of Invention

In order to overcome the shortcoming that exists among the prior art after the connecting piece is squeezed into soft substrate wall body insecure easy being extracted, the utility model aims to provide an expansion bolt improves external article and soft substrate wall body coupling's fastness.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the utility model provides an expansion bolt, includes first hollow cylinder, the hollow cylinder of second and is used for connecting a plurality of card of first hollow cylinder and the hollow cylinder of second and holds the connecting strip, the central axis of first hollow cylinder with the central axis coincidence of the hollow cylinder of second, a plurality of the both ends of holding the connecting strip are connected first hollow cylinder and the hollow cylinder of second respectively, a plurality of the central axis that the connecting strip was held to the card is arranged around first hollow cylinder.

Furthermore, the second hollow cylinder is the back taper platform form, and the external diameter that the first hollow cylinder one end was kept away from to the second hollow cylinder is less than the external diameter that the second hollow cylinder is close to first hollow cylinder one end.

Furthermore, each clamping connecting strip is provided with a plurality of teeth, the teeth are arranged along the length direction of the clamping connecting strips, the distance between every two adjacent teeth is set, and the teeth are arranged on one side, away from each other, of the clamping connecting strips.

Furthermore, the teeth are helical teeth, and the helical teeth are formed by protruding from the clamping connecting strip towards the direction far away from the clamping connecting strip and towards the direction close to the first hollow cylinder.

Furthermore, one side of the first hollow column body, which is far away from the second hollow column body, is provided with a convex ring, and the convex ring starts from the outer side wall of the first hollow column body and extends towards the direction far away from the central axis of the first hollow column body.

Furthermore, the second hollow cylinder is provided with a tightening part, the tightening part is arranged at one end, close to the clamping connecting strip, of the second hollow cylinder, and the outer diameter of the tightening part is smaller than that of the second hollow cylinder.

Furthermore, first hollow cylinder is equipped with the first rib of a plurality of, a plurality of first rib sets up around the central axis of first hollow cylinder, the lateral wall of first hollow cylinder is located to first rib, and first rib extends the setting along the length direction of first hollow cylinder.

The utility model has the advantages that: the expansion bolt is designed into a structure formed by the first hollow cylinder, the second hollow cylinder and the plurality of clamping connecting strips, so that when the expansion bolt is inserted into a wall, after the expansion bolt enters the wall, the clamping connecting strips are extruded and deformed along with the continuous screwing of the screw into the wall, the middle parts of the plurality of clamping connecting strips are extended and deformed towards the direction away from each other and enter the wall, the resistance between the wall and the expansion bolt is increased, the stability of the expansion bolt in the wall is improved, and the aim of firmer combination of an external object and the wall is fulfilled.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of the present invention;

fig. 2 is a top view of a first embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

FIG. 5 is a schematic structural view of a first embodiment of the present invention in a use state;

fig. 6 is a schematic structural diagram of a second embodiment of the present invention.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings, which are not intended to limit the present invention.

The first embodiment.

Please refer to fig. 1 to 5, the utility model discloses an expansion bolt, including first hollow cylinder 1, second hollow cylinder 2 and be used for connecting first hollow cylinder 1 and second hollow cylinder 2's a plurality of card and hold connecting strip 3, first hollow cylinder 1's the central axis with the coincidence of the central axis of second hollow cylinder 2, a plurality of the both ends of holding connecting strip 3 are connected first hollow cylinder 1 and second hollow cylinder 2 respectively, a plurality of card is held connecting strip 3 and is arranged around the central axis of first hollow cylinder 1.

Specifically, in this embodiment, the expansion bolt is integrally formed, the expansion bolt is made of plastic, two ends of the expansion bolt in the length direction are respectively a first hollow cylinder 1 and a second hollow cylinder 2, the number of the clamping connection strips 3 is four, the first hollow cylinder 1 and the second hollow cylinder 2 are connected by four clamping connection strips 3, two adjacent clamping connection strips 3 are arranged at intervals, the four clamping connection strips 3 surround to form a middle cavity, an external screw 100 sequentially penetrates through the middle cavity defined by the first hollow cylinder 1 and the four clamping connection strips 3, the second hollow cylinder 2 is connected with the soft base material wall, when the expansion bolt is knocked in or screwed into the soft base material wall by an external force, the second hollow cylinder 2 firstly enters the wall, the four clamping connection strips 3 are respectively extruded under the action of the external screw 100, the first hollow cylinder 1 and the wall, the clamping connection strips 3 increase the friction force between the expansion bolt and the wall, the stability of the expansion bolt in the wall body is improved.

Through designing the expansion bolt into the structure that comprises first hollow cylinder 1, second hollow cylinder 2 and a plurality of card holding connecting strip 3, make when the expansion bolt goes into the wall, after the expansion bolt gets into the wall, along with the continuous screw in wall of screw 100, the card is held connecting strip 3 and is extruded deformation, and the middle part of a plurality of card is held connecting strip 3 and is gone into in the wall towards the direction projection deformation that keeps away from each other, increases the resistance between wall body and the expansion bolt, improves the stability of expansion bolt in the wall body, realizes that external object and wall body combine more firm purpose.

Hollow cylinder 2 of second is the back taper platform form, and the external diameter that hollow cylinder 2 of second kept away from 1 one end of first hollow cylinder is less than the external diameter that hollow cylinder 2 of second is close to 1 one end of first hollow cylinder, the structural design of back taper platform form for the wall is changeed into to the expansion bolt, improves the installation effectiveness.

Each clamping connecting strip 3 is provided with a plurality of teeth 31, the plurality of teeth 31 are arranged along the length direction of the clamping connecting strips 3, the distance between every two adjacent teeth 31 is set, the teeth 31 are arranged on one side, away from each other, of the plurality of clamping connecting strips 3, and the arrangement of the plurality of teeth 31 further improves the binding force of the clamping connecting strips 3 and the wall body, so that the expansion bolt is more stable in the wall body.

The teeth 31 are helical teeth, the helical teeth are formed by protruding from the clamping connecting strip 3 towards the direction far away from the clamping connecting strip 3 and towards the direction close to the first hollow column body 1, and the teeth 31 are made into helical teeth, so that the expansion bolt has the characteristics of smoothly entering the wall and being not easy to separate from the wall, and the firmness of the expansion bolt in the wall is further ensured.

One side that second hollow cylinder 2 was kept away from to first hollow cylinder 1 is equipped with bulge loop 11, bulge loop 11 begins the lateral wall of first hollow cylinder 1 and extends towards the direction of keeping away from the central axis of first hollow cylinder 1, and the setting of bulge loop 11 prevents that the expansion bolt is sunken into the wall body completely, influences the cohesion of external article and wall body, influences the planarization on wall body surface simultaneously.

The second hollow cylinder 2 is equipped with tightening part 21, tightening part 21 is located the second hollow cylinder 2 and is close to the one end that the connecting strip 3 was held to the card, the external diameter of tightening part 21 is less than the external diameter of second hollow cylinder 2, the setting of tightening part 21 for tightening part 21 department is inseparabler with external connection screwed connection, and the card is held the connecting strip 3 and is extrudeed by the wall body after, and the expansion bolt atress is bigger, is difficult for being extracted.

First hollow cylinder 1 is equipped with the first rib 12 of a plurality of, a plurality of first rib 12 sets up around the central axis of first hollow cylinder 1, the lateral wall of first hollow cylinder 1 is located to first rib 12, and first rib 12 extends the setting along the length direction of first hollow cylinder 1, and the quantity of first rib 12 is four, increases the resistance between first hollow cylinder 1 and the wall body, prevents the random rotation of first hollow cylinder 1 in the wall body.

Example two.

Referring to fig. 6, each of the retaining connection bars 3 further has a second rib 33, the second rib 33 is disposed along the length direction of the retaining connection bar 3, and the second rib 32 protrudes from the surface of the tooth 31.

Specifically, in this embodiment, the second ribs 32 are arranged along the length direction of the retaining connection bar 3, and the second ribs 33 intersect with all the teeth 31 and protrude from the surfaces of the teeth 31, so as to increase the strength of the retaining connection bar 3, that is, the strength of the expansion bolt, improve the service life of the expansion bolt, enhance the binding force between the expansion bolt and the wall body, and ensure the firmness between the external object and the wall body.

The rest of this embodiment is the same as the first embodiment, and the unexplained features in this embodiment are explained by the first embodiment, which is not described herein again.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. An expansion bolt, characterized in that: including first hollow cylinder, the hollow cylinder of second and be used for connecting a plurality of card of first hollow cylinder and the hollow cylinder of second and hold the connecting strip, the central axis of first hollow cylinder with the central axis coincidence of the hollow cylinder of second, a plurality of the both ends of holding the connecting strip are connected first hollow cylinder and the hollow cylinder of second, a plurality of respectively the card is held the connecting strip and is arranged around the central axis of first hollow cylinder.

2. The expansion bolt of claim 1, wherein: the hollow cylinder of second is the back taper platform form, and the external diameter that the hollow cylinder of second kept away from first hollow cylinder one end is less than the external diameter that the hollow cylinder of second is close to first hollow cylinder one end.

3. The expansion bolt of claim 1, wherein: each clamping connecting strip is provided with a plurality of teeth, the teeth are arranged along the length direction of the clamping connecting strips, the distance between every two adjacent teeth is set, and the teeth are arranged on one side, away from each other, of the clamping connecting strips.

4. The expansion bolt of claim 3, wherein: the tooth is the skewed tooth, the skewed tooth is established suddenly from the card holding connecting strip towards keeping away from the direction of the card holding connecting strip and towards the direction that is close to first hollow cylinder.

5. The expansion bolt of claim 1, wherein: one side of the first hollow column body, which is far away from the second hollow column body, is provided with a convex ring, and the convex ring extends from the outer side wall of the first hollow column body and towards the direction of the central axis of the first hollow column body.

6. The expansion bolt of claim 1, wherein: the second hollow column body is provided with a tightening part, the tightening part is arranged at one end, close to the clamping connecting strip, of the second hollow column body, and the outer diameter of the tightening part is smaller than that of the second hollow column body.

7. The expansion bolt of claim 1, wherein: first hollow cylinder is equipped with the first rib of a plurality of, a plurality of first rib sets up around the central axis of first hollow cylinder, the lateral wall of first hollow cylinder is located to first rib, and first rib extends the setting along the length direction of first hollow cylinder.